EUVD-2026-20783
GHSA-pxvw-54xc-72wm
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
3Description
The Post Blocks & Tools plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sliderStyle' block attribute in the Posts Slider block in all versions up to, and including, 1.3.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Analysis
Stored Cross-Site Scripting in Post Blocks & Tools WordPress plugin versions up to 1.3.0 allows authenticated attackers with author-level access to inject arbitrary JavaScript through the 'sliderStyle' block attribute in the Posts Slider block, which executes in the browsers of all users viewing affected pages. The vulnerability stems from insufficient input sanitization and output escaping, enabling persistent payload injection that affects any site administrator or editor visiting a compromised post.
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External POC / Exploit Code
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